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-- https://github.com/golang/tools/tree/master/gopls
local mod_cache = nil
---@param fname string
---@return string?
local function get_root(fname)
if mod_cache and fname:sub(1, #mod_cache) == mod_cache then
local clients = vim.lsp.get_clients({ name = 'gopls' })
if #clients > 0 then
return clients[#clients].config.root_dir
end
end
return vim.fs.root(fname, { 'go.work', 'go.mod', '.git' })
end
return {
cmd = { 'gopls' },
filetypes = { 'go', 'gomod', 'gowork', 'gotmpl' },
root_dir = function(bufnr, on_dir)
local fname = vim.api.nvim_buf_get_name(bufnr)
-- see: https://github.com/neovim/nvim-lspconfig/issues/804
if mod_cache then
on_dir(get_root(fname))
return
end
local cmd = { 'go', 'env', 'GOMODCACHE' }
vim.system(cmd, { text = true }, function(output)
if output.code == 0 then
if output.stdout then
mod_cache = vim.trim(output.stdout)
end
on_dir(get_root(fname))
else
vim.notify(('[gopls] cmd failed with code %d: %s\n%s'):format(output.code, cmd, output.stderr))
end
end)
end,
settings = {
gopls = {
gofumpt = true,
codelenses = {
gc_details = false,
generate = true,
regenerate_cgo = true,
run_govulncheck = true,
test = true,
tidy = true,
upgrade_dependency = true,
vendor = true,
},
hints = {
assignVariableTypes = false,
compositeLiteralFields = false,
compositeLiteralTypes = true,
constantValues = true,
functionTypeParameters = false,
parameterNames = false,
rangeVariableTypes = true,
},
analyses = {
fieldalignment = true,
nilness = true,
unusedparams = true,
unusedwrite = true,
useany = true,
},
usePlaceholders = false,
completeUnimported = true,
staticcheck = true,
directoryFilters = { '-.git', '-.vscode', '-.idea', '-.vscode-test', '-node_modules' },
semanticTokens = true,
},
},
on_attach = function(client, _)
-- workaround for gopls not supporting semanticTokensProvider
-- https://github.com/golang/go/issues/54531#issuecomment-1464982242
if not client.server_capabilities.semanticTokensProvider then
local semantic = client.config.capabilities.textDocument.semanticTokens
client.server_capabilities.semanticTokensProvider = {
full = true,
legend = {
tokenTypes = semantic.tokenTypes,
tokenModifiers = semantic.tokenModifiers,
},
range = true,
}
end
-- end workaround
end,
}
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